How can I “override” [] to accept two arguments in C++?

Question

I am trying to create a bit-vector class in C++ to model some hardware. In most HDLs (hardware description langauges) that I know, specific bits are referenced like this:

Answer 1

Two argument operator[] is not possible in C++. The names of, precedence of, associativity of, and arity of operators is fixed by the language.1 Operator() however can take two arguments...